3 years ago

Elements in Group VIIIA (also known as Group 18, or the noble gases) have

1 answer:

3 0

The answer is C (the same number of valence electrons)

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Answer:

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Ivanshal [37]

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baherus [9]

Answer:

$\theta_c = 36.78^o$

Explanation:

The relationship between the refractive index and the critical angle is given as follows:

$\eta = \frac{1}{Sin\ \theta_c} \\\\Sin\ \theta_c = \frac{1}{\eta}\\\\\theta_c = Sin^{-1}(\frac{1}{\eta} )$

where,

η = refractive index = 1.67

θc = critical angle =?

Therefore,

$\theta_c = Sin^{-1}(\frac{1}{1.67} )$

$\theta_c = 36.78^o$

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storchak [24]

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s2008m [1.1K]

Gravitational I think would be the answer, Hope this helps!

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3 years ago